Transmission.



E. M. & A. s RAYBURN.

TRANSMISSION. APPLICATION FILED JuLYHs. 1917.

- Patented Mar. 18, 1919.

' a suns-swan A TTOR/VEVS E. M. & A. G. RAYBURN.

TRANSMISSION.

APPLICAT ON FILED JULYI6, l9l7.

,4 TTOR/VEYS 8 SHEETSSHEET 2.

Patented Mar. 18-, 1919.

WITNESSES E. M. & A; s. RAYBURN.

TRANSMISSION.

APPLICAT ON FILED JULYI 6. 1917.

Patented Mar. 18,1919.

rid/Win72 A TTORNEYS WITNESSES E. M. & A. G. RAYBURN.

TRANSMISSION. APPLICAT ON FILED .IULYIE, 1917.

Patented Mar. 18, 19-19.

mfim m5 M. E w. n m WWW, W w && W 4 m 291 WITNESSES E. M. & A. G. RAYBURN.

TRANSMISSION.

1,297,734, APPLICATION FILED JULYIB, I917; Patent Jed Mar. 1851919 8 SHEETS-SHEET 6.

Fig .19;

' ATTORNEYS E. M. & A. G. RAYBURN.

TRANSMISSION.

i,297?34' I I 1 APPLICATION FILED JULYIG, 191T- Patented Mar.

8 $HEETSSHEET 7- v INVENTORS 42201777 @QZQI'IZ A TTORIVEYS E. M. & A. G. RAYBURN.

TRANSMISSION.

R-PPLICATIQN FILED luLYle. 1917.

Patented Mar. 18,1919.

8 SHEETSSHEET 8- A TTORNEVS WITNESSES transmission;

ELWYN METTE RAYBURN' AND ALDEN GRANVILLE RAYBURN, 0F SAUSALITO, CALI- FORNIA, ASSIGNORS 0F ONE-THIRD TO EDDY RAYBURN, OF SAUSALITO, GALI- FORNIA.

TRANSMISSION.

To all whom it may concern:

Be it known that we, ELWYN METTE RAY- BURN and ALDEN GRANVILLE RAYBURN, citi- Zens of the United States, and residents of Sausalito, in the county of Marin and State of California, have invented new anduseful Improvements in Transmissions, of which the following is aspecification.

Our invention is an improvement in transmissions, and has for an object to provide a transmission especially adapted "for use with motor vehicles and the like, wherein fluidmontrolled means is provided for connecting the driving shaft to the driven shaft at any desired speed, and wherein means is provided in connection with the transmis* sion for converting into use that portion of the power of the motor which is usually Fig. 3 is a longitudinal section of the Fig. 4 is an enlarged detail of a portion of 'Fig. 3, showing the packing;

' Figs. 5, 18 and 22 are sections on the lines 55, 18 l8" and 22+22, respectively, of

Fig. 3;

Fig. 6 is a partial side view of the valve;

Fig. 7 is a section on the line 77 of Fig. 6;

Fig. 8 is a sectional view of the control-v ling mechanism fpr the transmission;

Fig. 9 is an enlarged detail of a portion of Fig. 8, showing the valve ,mounting;

Fig. 10 is an enlarged detail of the'controlling mechanism forthe'reversing valve;

Figs. 11, 13 and 14 are sections on the lines 1111, 13 13 5 and 1414, respectively, of Fig. 8, Fig. 14.- looking in the direction of the arrow adjacent to the line;

Fig. 12 is a section on the line 1212 of side of the opening as a bearing during half Fig. 10;

Fig. 15 is a section on the line 15- -15 of v Fig? 14 Fig. 16 1s an enlarged side view of the controlling valve for the transmission;

Specification of Letters Patent. Patented Mar,

' Application filedluly 16, 1917. SerialNo. 180,843.

Fig. 17 is' a section on the'line 1717 of Fig. 16;

Fig. 19 is a g 4 partial section of the left-end. of F1g. 3, taken at right angles to Fig. 3;

Fig. 20 is a section on the line 2020 of Fig. 19;

Fig. 21 is a detail section showing the connection between the holder and the ring; Fig. 23 is a detail view, with parts broken away, of the operating mechanism for the rmg; I v

Fig. 24 is WISE/0131011 on the line 24,24 of Fig. 23, looking in the direction of the ar- Fig. 26 is a section on the line 2626 of 25, looking in the direction of the arrows adjacent the line.

In the present embodiment of the invention', the driving shaft 1 has, at the end thereof, a plate or disk 2 which is securely bolted to the head 3 of the rotating part of the transmission casing, the said casing constituting, in effect, a fly wheel, and the I drivenyshaft 4 is journaled at the center of the casing 5, the said shaft egrtending to/the head 3 and'being journaled in a combined radial and thrust bearing 6.

The casin 5 is rotatable, and this casingcarries a series of cylinders 7, thesaid series being arranged in an annular form about the shaft as an axis, and in each cylinder is a piston 8, each piston having the usual rings, as shown. Each piston 8has a rod 9" connected therewith by a ball and socket joint, and at itsouter end each rod has a split-head or ball lO, which isreceived within a socket in a ring 11, and is held inplace by a ring12'having openings of such diameter that the balls may not pass, and this a rod, the said openings being so shaped as to permit the rods 9 to press against the inthe stroke of the connecting rod. The purpose of these rings 13 is to keep the ring 11 within limited lateral motion with respect to the cylinders.

A circular holder or trackway 15 is arranged at the outer face of the ring 11, and a ball bearing 16 is arranged between the holder and the ring, and the holder is kept in proper position with respect to the ring by a ring 17 securedto the ring 11 and having a marginal flange 18 engaging a ledge or shoulder on the holder. holder the inclination of the ring may be varied, while at the same time the ring is free to rotate with respect to the holder.

A stationary casing 19 is mounted inside the casing 5, and inside the annular, series of cylinders, and this casing contains a series of cylinders 20. In each cylinder 20 apiston 21 is mounted, and each piston has connected therewith one end of a rod 22, the connection being by a ball and socket joint. Each rod 22 has a head at its outer end, and each of these heads is received in a socket in a ring 24. Referring to Figs. 19 and 20, it will b noticed that these heads are retained in p ace by means of a substantially U-shaped clip 25, whlch passes through a split 26 in the rod and head, and has radially extending lugs 27 at its ends, which engage recesses 28 in the rlng.

A ring or Washer 29 is secured to the ring 24 on its inner face, and a circular holder or guide 30 is arranged adjacent to the outer face of the ring. A. ball bearing 31 is arranged between the holder and the ring,

and the holder is held to the ring by rings 32 resembling the rings 17, the said rings 32 having marginal flanges 33 engaging a shoulder or ledge on the holder.

The holder 15 before mentioned is sup ported by arms 34 which extend in opposite directions from a hub 35 keyed to the driven shaft 4, the said arms curving outwardly and toward the holder, to which they are connected by a ring 35. This ring is secured to the arms asshown, and has a marginal flange'36 engaging a shoulder or ledge .on the holder. The holder 30 is supported by the shaft 4, the said shaft having oppositely extending integral lugs 37 to which the holder is connected. The holder has an extension 38 which forks at the end remote from the holder, and the arms of the fork extend overthe opposite sides of the shaft at the lugs 37. A plate 39 is secured to each arm of the fork (Figs. 19 and 21) and each of these plates extends across the end of the adjacent lug 37 and is provided with a pin 40 engaging a recess in the lug. Thus both holders are supported by the shaft 4. Each of the holders 15 and 30 is provided with -a pair of parallel are shaped arms 41 and 42, respectively, (Fig. 3) the said arms extending inwardly toward the shaft 4, as shown, and the members of each pair extend on opposite sides of the shaft.

The arms have are shaped slots, and the By. means of the said slots of the arms engage lugs 43 extend-- ing laterally from a sleeve 44 which is mounted to slide on the shaft 4, and it will be evident that when the sleeve is moved the holders'will be swung. It will be noticed from an inspection of Figs. 3 and 23 that the slots of the arms 41 and 42 are oppositely arranged. This sleeve has slots 45 for permitting the passage of the lugs 37, and the sleeve is connected to a second sleeve 46 arranged between the C5 sing 19 and the shaft 4 by a threaded connection, a third sleeve 47 encircling the two sleeves at the connection.

A collar 48 is arranged at the end ofthe sleeve 46 remote from the holders, between a radial rib 49 on the end of the sleeve46 and a similar rib 50 on a sleeve 51 which is threaded on to the sleeve 46 at the inner Ball bearings 52 are an" side of the collar. ranged between the collar and the flanges 49 and 50, and the collar has opposltely extending lugs 53 for engagement by operatto the casing 19, as indicated at 55.

A packing ring 56 is arranged between the adjacent ends of the casings 5 and 54, and this ring is normally pressed toward theend of the casing 5 by coil springs 57 arranged within recesses in the casing 54. An extension 58 is connected with the said end of the casing 54, and this extension is con nected with a cap 59 at its outer end, the said cap carrying a stufling box 60 in which the shaft 4 is journaled. v the extension 58 are adapted to be filled with oil, and the cylindersof the casings 5 and 19 are adapted to pump this oil from one series to another.

The passage of the oil from the cylinders is controlled by a rotary valve 61, the said valve being in the form of a ring, which encircles the shaft 4 between the casings 5 and 19 within an annular valve chamber 62 formed by the two casings 5 and 19, and the said valve extends through an annular opening 63 between the two casings 5 and 19 into the space formed between the ends of the casings 5 and 54. Here the valve has an internal gear ring 64, which is engaged by a pinion 65'on a shaft 66 j-ournaled in a bushing 67 in the end of the casing 54. This shaft 66 has a pinion 68 at its outer The casing 5 and end, which meshes with an internal gear Figs. and 22, has two positions, the said valve being movable longitudinally in the valve chamber, and it will be noticed that only enough of the material of the valve being left between the ends of the ports to A separate the ports. This position is indicated by dotted lines in Fig. 3, the ports 71 forming a direct communication between the cylinders 7 and'20.

In order to obtain the reverse motion, the valve is moved longitudinally to bring the other ports 72, shown in Fig. 22, into register with the ports that place the cylinders 7 and 20' into communication, that is, to bring the ports 72 ofFig. 3 into the position occupied by the ports 71 in the said figure. The said passages 72 extend from the periphery of the valve at opposite points thereof to the inner edge of the valve, extending over almost the entire circumference of the valve, and delivering near'where they enter, but at the opposite edge of the valve. Thus when the valve is moved longitudi nally to bring the ports 72 into register with the passages between the cylinders 7 and 20, the oil passing from one series of cylinders to the other will be delivered at two points almost diametrically opposite the point of delivery when the valve is in the position of Fig. 4. With the ports 71 connecting the cylinders 7 and=-20 the'flow of the oil 1s direct and radial. With the ports 72 between the cylinders, the oil must travel, in order to pass from the cylinders 7 to the cylinders 20, to a point diametrically opposite, that is, in passing from a cylinder 7 to a cylinder 20 the oil must pass to a point practically diametrically opposite where it enters the port 72. This will be evident from an inspection of Fig. 22.

Movement of the valve 61 is controlled by the controlling mechanism for the transmission, to be described. The said mechanism comprises a cylinder 73, in which is arranged a piston 74, and a-ro'd or'shaft is connected with the piston, and extends through "a stuffing box in one head of the cylinder, the said head 76 being detachable, as shown. The cylinder has ports 77, 78, 79, 80 and 81, and valves 82', 83 and 84 are provided for controlling the ports. The ports 77, 7 8, 79 and 81 are arranged to place the ends of the cylinder in communication with the interior of the casing 5 through a chamber 85 with which the said ports communicate. The valves 81 and 84 are spring- 7 controlled check valves, both permitting the fluid to pass from the chamber 85 intothe respective ends of the cylinder when the pressure in the chamber exceeds that in the cylinder. When the piston moves toward the right-the fluid may be drawn into the left end of the cylinder through the passage 81, while when the piston moves to the left the fluid may pass into the cylinder through the ports 77 and 78.

The valve 82, shown more particularly in Figs. 16 and 17, has a conical portion, intermediate the ends of which is a groove 83" extending circumferentially of the valve, and thin extensions 84 lead fromv each end of the groove, the said extensions gradually decreasing in width and depth. The large end of the valveis recessed, as shown at 85', and a coil spring 86 is, arranged within this recess, between a nut 87 threaded into the casing and the bottom of the recess, the spring acting normally to force the valve to its seat; At the opposite end a pinion 88 is secured to the stem of the valve, and this pinion is engaged by arack bar 89 to be later described. The valve 83 is mounted like the valve 82, having the recess 90, the coil spring 91 therein, .and the nut 92 engaging the spring to force the valve toward its seat, and thevalve has a conical portion, as shown in Fig. 11. This valve has a trans verse diametrical passage, as shown in Fig.

8, and when the valve is in the position in.

connects the other arm of the bell crank with operating mechanism to be described. The rack bar 89 is-on one end of a lever 98 also pivoted on the pin 96 intermediate its ends, and having at its front end a sliding block 99, which has a sliding engagement with a laterally extending lug 100 on a cam plate 101, which is moved vertically, under conditions to be presently described, to swing the arm 98 to operate the valve.

The connection between the sleeve 44 and the controlling mechanism is shown in Figs: 8 and 13 and comprises a fork-102, whose arms are connected with the lugs 53 be-' fore mentioned, the said fork being shown more particularly in Fig. 13. This fork is secured to one end of a shaft 103' journaled in a bushing 104 inthe casing, and a second fork 105 is secured to the outer end of the shaft (Fig. 13). The arms of the fork 105 have notches or recesses 106 in their ends, which are engaged by sllde blocks 107 pivoted to laterally extending pins 108 on the arms of another fork 109. The arms of this fork extend longitudinally of the shaft 75, on opposite sides thereof, and body of this fork has threaded engagement with the shaft 75, as shown in Fig. 8, and beyond the body of the fork the shaft is enlarged antl'chambered, as shown in said figure. A guide 110 is arranged in the chambered portion, and coil springs 111 are arranged between the guide and each end of the chamber, the outer end of the chamber being closed by a threaded plug 112. A pedal or treadle 113 is pivoted to the casing at 114:, and the lower end of the treadle is forked, the arms engaging opposite sides of the guide 110, and being pivoted thereto by a bolt 115. There are slots in the sides of the enlargement at the outer end of'the fork 109 in which the pin 115 may move. The lower ends of the arms of the" fork of the treadle 113 are recessed, as shown at 116, to form guideways, and blocks 117 are mountedt o move in the guideways. Thus the guideways will move with the block without interfering with the movement of the treadle. The cam plate 101 before mentioned is arranged -at one side of the guide, the said guide having a depending portion 118 at its side,and the plate is held inplace by a holding plate 119. The cam plate 101 is mounted for vertical movement, having an angular slot 120, which is engaged by a roller 121 on the bolt 115. It will be obvione that when the guide 110 is moved longitudinally the plate 101 will be swung, and the lug 100 will, swing on an arc Whose center is the 'bolt 115, being thus raised and lowered, and the lever 98 connected therewith will 'be swung. The treadle 113 is normally spring-held rearwardly by a coil spring 122 arranged between the treadle and the casing, and it is adapted, to be pressed forward by the foot of the driver.

The reversing mechanism of the revers-' ing valve is operated through the movement of the arm 95. This arm has an extension 123 just above the pinion 93, and the extension is provided with an angular slot 124:. The valve 61 has an annular groove for receiving a ring 125, and a rod 126. connected with this ring extends outwardly through the casing, where it is connected to a double angle arm 127. The body of this arm extends substantially parallel with the rod 126, and] at the end remote from its connection with the rod 126 a roller 128 is journaled, on the rod, and the said roller engages the slot 124 of the extension of the arm 95. The arrangement of the slot 124: is such that when the rear end of the arm95 is moved upwardly beyond a predetermined distance the roller 128 will be moved rearwardly or toward the extension 58 of the casing, to

to be engaged by the handle, to hold the handle in a-d'usted position, and at each notch on, tlie iipper'face of the segment is a letter, the said letters being respectively B, L and N, and designate reversed, locked and neutral position of the controlling mechanism.

In ope-ration, the operator will push the pedal 113 to its extreme forward position, where it may be either held by the foot or the handle 131 on the steering column may be moved to the position indicated by the letter L. \Vhen the pedal is pushed to its extreme forward position, it may be held by the foot or it may be held by moving the handle 131 to the letter L. The moving of the handle to this position locks the piston 74 in forward position as hereinafter described, and also moves the parts into neutral position. The operation of the transmission to forward or reverse is brought about by the rearward movement of the pedal. This movement of the handle to the position L swings the bell crank 95', ro-

tating the valve 83 to cause the passage through the .said valve to stand at'right angles to the port 80, thus closing the passage 81 and trapping the oil on'thatside of the piston nearest the treadle. The oil here is held from flowing to the chamber 85 by the valve 81*. Hence the spring 122 cannot return the treadle from, its forward position, even when the operator moves his foot. At this stage of the operation the motor may be started, and will run without energy being transferredeto the driven shaft because the transmissionis in neutral position. It will be understood that upon starting the motor all of the elements of the clutch unit, that is, the cylinders 7 and assotates in one plane only, and has no tendency to gyrate, that is, the cylinders 20 and associated parts will also remain stationary because there is no pumping action.

The operator now wishing to start the vehicle willei'ther permit the pedal to move slowly backward, under the pressure of his foot or he can regulate th backward movewill gradually move through all the posi-- tions from neutral into high speed.

The backward movement of the pedal inclines the plane of the holder 15. It will be understood that since there is no pressure in the cylinders 7 and 20, when the engine 1s idling because there is no pumping action, the energy from the spring 122 is just great enough to start the pedal back- Ward from neutral or idling position, and

because ,of this backward movement the sleeve 44 is shifted 'rearwardly, that is, toward the extension 58, to incline the holder 15 from the perpendicular, and to lessen the inclination of the holder 30. The ring 11 is rotating rapidlyagainst the face of the holder 15, and the said ring will be given a rapid, but very slight, gyratory motion.

The pistons 8 are connected to the ring-11,

and are consequently given a strokein proportlon to the magnitude of the gyration of M the ring 11. The stroke of the said pistons at first is very short, and consequently a very small volume of oil is forced throu h the valve 61 into the cylinders 20. 'The plstons in thesaid cylinders 20 at this instant are capable of taking their greatest stroke. Therefore, when the above mentioned volume of oil, which is under great pressure due to the extremely short stroke of the piston .8, is fo'jroed into'the cylinders 20, the pistons Qkfiivfiilexert great force against the ring 24 d the connecting rods 22. Since the holder'30i's at its smallest angle to the shaft 4, any pressure parallel to the shaft and against the ring 30 will force the holder I to revolve and the shaft 4 will be carried therewith, the said shaft being attached to the holder. I v

If the operator wishes to further increase the s ed of his vehicle, he will permit the treadl to move backwardly, controlling the sanie with the foot or with the handle 131. From the instant the first pressure is generated in the clutch unit until vtheins-tant whenall pressure ceases, variable speed and. traction are obtained; Such pressure is at alltimes controlled by the operation of the treadle which in turn operates the valve 82.

When the treadle is moved forwardly the valveis rotated slightly, bringing the extension at one end of the groove into register withthe port 80, and connecting that end of the cylinder adjacent to the treadle with the chamber 85. .Thus the oil may gradually escape to permit the treadle to return to backward position. With the valve .83 in closed position, however, this action would not be permitted. When the treadle is in rearward position the extension at the other end of the port 84 is in register with the passage 77, and the oil may escape from behind the piston.

It will be noticed from an inspection of Fig. 5 that the valve 61 has ports 135 which are controlled by ball check valves-1 36, and the ports communicate with the ports 71 to feed oil from the easing into the ports 71.

In Figs. 6 and 7 are shown the piston rings 137 for the valve 61. These rings are three in number and they are supported by cross bars 138.arranged transversely of the recesses 139 in which the rings are arranged. These cross bars are pressed outwardly by springs 140 which are arranged beneath .the cross bars. Bushings 141 and 142 are ar ranged between the cylinder supporting casings 5 and 19, and between the cylinder casing 19 and the sleeve 46, respectively, .and a filling opening is provided in the fixed or outer casing for admitting oil, the said open ing being normally closed by a threaded plug-143. A second opening is provided for draining the casing 5, the said opening being normally closed by a threaded plug 144. The filling opening is in the extension 58, at the upper side thereof, while the drain opening is at the opposite end of the casing 5.

It will be evident fromthe foregoing description that the driven shaft can be brought up to the speed bf the driving shaft gradually and smoothly, and finally connected positively to the said driving shaft without friction or direct. dogging devices,'

The boosting unit will receive all of the slip of the clutch unit, which otherwise would be wasted, and will'transform it into use for work on the driven shaft. The clutch and boost-ing units are controlled a part ofthe time simultaneously, and the reciprocating parts are at rest while the driven shaft is stationary and the driving shaft rotating, as well as when the driven and driving shafts are rotating atthe same speed.

The improved transmissionis silent, and absolutely smoothin action, and all variable speeds, a neutral condition, and a braking of the vehicle against the. motor compression r and against the frame ofthe vehicle are controlled by a single pedal, andthis pedal can be made to regulate the speed on the slightest motion on the part of the operator, thus eliminating excessive spring tenslon and extra eifort. The oil which is used for transmitting power to the driven shaft'alsolubricates-the-pa'rts, without necessltating auxil- 'iary chambers and piping, and frequent replenishment of the oil is unnecessary. The

handle 131 can progressively produce the following functions: first, hold the driven shaft at any definite speed below or at high speed, or at a standstill; second, release any one of the before mentioned act-ions, thereby permitting the foot pedal to act independently of the position of the lever; third, move the rotary valve into such a position as to cause the gradual or abrupt braking of the driven shaft against the frame of the vehicle; fourth, move the rotary valve into such a position as to lock the driven shaft with the frame of the vehicle; fifth, move the rotary valve into such a position as to reverse the flow of fluid between the two units, thusreversing the driven shaft" In Figs. and 26 is shown a modified form of controlling mechanism. I'nthis construction the treadle 113 is pinned to the body 145 of a yoke comprising the said body and arms 147 and 148. The arm 148 of the yoke is pivoted to the frame, as indicated at 149, and the arm 147 of the yoke is pivotally connected to the guide 150 corresponding to the guide 110 of Fig. 8. Coil springs 151 a are at the ends of the guide within the chamin Figs. 25 and 26 is the same bered portion of the body of the fork 109. The construction, so far as the treadle connection is concerned, is otherwise the same as that shown in Fig. 8. The cylinder 73 corresponding to the cylinder 73 of Fig. 8 has arranged therein the piston 74 which is connected by the rod 75 to the yoke 109. The valve 82 corresponding to the valve 82 of Fig. 8 is arranged at that end of the cylinder adjacent to'the treadle instead of at the opposite end as shown in Fig. 8. This valve is operated by the bell crank 95 and the valve 83 corresponding to the valve 83 of Fig. 8 is operated in the same manner as the valve 83.

A valve 84 corresponding to the valve 84 of Fig.8 is arranged at the opposite end of the cylinder from the valve 84, as is also the valve 81 corresponding to the valve 81 of Fig. 8. The valves 84 and 81 are, however, adapted to be operated to admit fiuid under pressure to the cylinder.

The operation, of the construction shown as that shown in Fig. 8. I r

We claim:

1. A transmission mechanism, comprising in combination with the alined driving shaft and driven shaft, a fixed casing, a casing rotatable in the fixed casing and secured to the driving shaft, each casing carrying an annular series of cylinders parallel and concentric with the shafts, pistons in the cylinders, a ring for each series, connecting rods connecting the pistons with the respective rings, an annular guide for each ring and abutting the ring, and against which the ring moves, said guides being connected to the driven shaft and rotating therewith, ports connecting the series of cylinders, a valve for controlling the said ports, the easings being adapted to contain oil, and the valve having ports for constraining the oil to move in a direction to drive. the driven shaft forwardly or in the reverse direction, means for constraining the guides to move in opposite directions to vary the inclination of the rings with respect to the shafts,

manually operated means cont-rolling said constraining means for moving the guides to neutral position, a spring for moving the guides to high speed position, ttluid-controlled means for controlling the action of the spring, means in connection with the said means for locking the spring from action, and a common means for operating the valve and the said last named means.

2. A transmission mechanism, comprising in combination with the alined driving shaft and driven shaft, a fixed casing, a casing rotatable in the fixed casing and secured to the driving shaft, each casing carrying an annular series of cylinders parallel and concentric with the shafts, pistons in the cylinders, a'ring for each series, connecting rods connecting the pistons with the respective rings, an annular guide for each ring and abutting the ring, and against which the ring moves, said guides being connected to the driven shaft and rotating therewith,

ports connecting the series of cylinders, a valve for controlling the said ports, the casings being adapted to contain oil, and the valve having ports for constraining the oil to move in a direction to drive the driven shaft forwardly or in the reverse direction,

means for constraining the guides to move .in opposite directions to vary the inclination of the rings with respect to the shafts, manually operated means controlling said constraining means for moving the guides to neutral position, a spring for moving the guides to high speed position, and means for braking the action of the spring controlled by the forward movement of the manuallyoperated means.

3. A transmission mechanism, comprising in combination with the alined driving shaft and driven shaft, a fixed casing, a casing rotatable in the fixed casing and secured to the driving shaft, each casing carrying an annular series of cylinders parallel and concentric with the shafts, pistons in the cylinders, a ring for each series, connecting rods connecting the pistons with the respectlve rings, an annular guide for each ring and abutting the ring, and against which the ring moves, said guides being connected to the driven shaft and rotating therewith, ports connecting the series of cylinders, a valve for controlling the said ports, the easings being adapted to contain oil, and the valve having ports for constraining the oil to move in a direction to drive the driven shaft forwardly or in the reverse direction,

means for constraining the guides to move in opposite directions to vary the inclination of the rings with respect to the shaft,

centric with the shafts, pistons in the cylinders, a ring for each series, connecting rods connecting the pistons with the respective rings, an annular guide for each ring and abutting the ring, and against which the ring moves, said guides being connected to the driven shaft and rotating therewith,

ports connecting the series of cylinders, a

valve for controlling the said ports, the casings being adapted to contain oil, and the valve having ports for constraining the oil to move in a direction to .drive the driven shaft forwardly or in the reverse direction, and means for simultaneously moving the guides in opposite directions to vary the inclination of the rings with respect to the shafts.

5. A transmission mechanism, comprising in combination with the alined driving and driven shafts, a fixed casing, a casing rotatable in the fixed casing and secured to the driving shaft, each casing carrying an annular series of cylinders parallel and concentric .with the shafts, pistons in the cylinders, 21 ring for each series of cylinders and connected to the pistons, guides for the rings connected with the driven shaft and mounted to swing-withrespect thereto, means for simultaneously movingthe guides in opposite directions, the asings being adapted to contain oil, and means for causing the oil to flow in a direction to move the driven shaft forwardly or in the reverse direction.

6. A transmission mechanism comprising in combination with the alined driving shaft and driven shaft, a fixed and a rotatable casing, the rotatable casing being secured to the driving shaft and rotating in the fixed casing, each casing carrying a series of pumps arranged parallel and concentric with the shafts, a rin for each series to which the plungers of t e series are connected, said rotatable casing being adapted to contain oil, and means for; simultaneously swinging the rings in opposite directions, said means being secured to the driven shaft and rotating therewith.

7 A transmission mechanism comprising in combination with the alined driving and driven shafts, a series of pumps carried by the driving shaft, a series of fixed pumps, both series encircling the driven shaft, a ring for each series of umps connected to the reciprocating portion of the series, and

means connected with the driven shaft and rotating therewith for simultaneously swinging the rings in opposite directions, said pumps delivering to each other, and means for reversing the direction of fluid from the pumps. p

8. A transmission mechanism comprising in combination with the alined driving and driven shafts, a series of pumps carried by the drivingshaft, a series of fixed pumps, both. series encircling the driven shaft, a ring for each series ofpumps connected to the reciprocating portions of the series, and

means connected with the driven shaft and rotating. therewith for simultaneously swinging the rings in opposite directions, said pumps delivering to each other.

ELWYN METTE RAYBURN. Y ALDEN GRANVILLE RAYBUBN. 

